53684172 has 18 divisors (see below), whose sum is σ = 135701748. Its totient is φ = 17894712.

The previous prime is 53684171. The next prime is 53684173. The reversal of 53684172 is 27148635.

It is an interprime number because it is at equal distance from previous prime (53684171) and next prime (53684173).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1491227 = 53684172 / (5 + 3 + 6 + 8 + 4 + 1 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (53684171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 745578 + ... + 745649.

It is an arithmetic number, because the mean of its divisors is an integer number (7538986).

Almost surely, 2^53684172 is an apocalyptic number.

It is an amenable number.

53684172 is an abundant number, since it is smaller than the sum of its proper divisors (82017576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53684172 is a wasteful number, since it uses less digits than its factorization.

53684172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491237 (or 1491232 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 53684172 is about 7326.9483415676. The cubic root of 53684172 is about 377.2379878577.

The spelling of 53684172 in words is "fifty-three million, six hundred eighty-four thousand, one hundred seventy-two".